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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 4 Jun 2019 21:08:48 +0100 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x54K8l4Y47448096 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 4 Jun 2019 20:08:47 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7DDFEA4040; Tue, 4 Jun 2019 20:08:47 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6F0A2A4057; Tue, 4 Jun 2019 20:08:46 +0000 (GMT) Received: from dhcp-9-31-103-88.watson.ibm.com (unknown [9.31.103.88]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 4 Jun 2019 20:08:46 +0000 (GMT) Subject: Re: possible deadlock in __do_page_fault (2) From: Mimi Zohar To: syzbot , adilger.kernel@dilger.ca, hdanton@sina.com, jmorris@namei.org, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, serge@hallyn.com, syzkaller-bugs@googlegroups.com, tytso@mit.edu Date: Tue, 04 Jun 2019 16:08:45 -0400 In-Reply-To: <000000000000a7a51a058a728a6c@google.com> References: <000000000000a7a51a058a728a6c@google.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.20.5 (3.20.5-1.fc24) Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 19060420-4275-0000-0000-0000033CE1D0 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19060420-4276-0000-0000-0000384CF220 Message-Id: <1559678925.4237.2.camel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-06-04_13:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=784 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906040127 Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Mon, 2019-06-03 at 15:04 -0700, syzbot wrote: > syzbot has bisected this bug to: > > commit 69d61f577d147b396be0991b2ac6f65057f7d445 > Author: Mimi Zohar > Date: Wed Apr 3 21:47:46 2019 +0000 > > ima: verify mprotect change is consistent with mmap policy > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16461c5aa00000 > start commit: 3c09c195 Add linux-next specific files for 20190531 > git tree: linux-next > final crash: https://syzkaller.appspot.com/x/report.txt?x=15461c5aa00000 > console output: https://syzkaller.appspot.com/x/log.txt?x=11461c5aa00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=6cfb24468280cd5c > dashboard link: https://syzkaller.appspot.com/bug?extid=606e524a3ca9617cf8c0 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10572ca6a00000 > > Reported-by: syzbot+606e524a3ca9617cf8c0@syzkaller.appspotmail.com > Fixes: 69d61f577d14 ("ima: verify mprotect change is consistent with mmap > policy") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection Thank you for the report. Mimi